13040618 has 4 divisors (see below), whose sum is σ = 19560930. Its totient is φ = 6520308.

The previous prime is 13040617. The next prime is 13040623. The reversal of 13040618 is 81604031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6775609 + 6265009 = 2603^2 + 2503^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13040593 and 13040602.

It is not an unprimeable number, because it can be changed into a prime (13040617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260153 + ... + 3260156.

Almost surely, 2^13040618 is an apocalyptic number.

13040618 is a deficient number, since it is larger than the sum of its proper divisors (6520312).

13040618 is an equidigital number, since it uses as much as digits as its factorization.

13040618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6520311.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 13040618 is about 3611.1795856756. The cubic root of 13040618 is about 235.3781026588.

Adding to 13040618 its reverse (81604031), we get a palindrome (94644649).

The spelling of 13040618 in words is "thirteen million, forty thousand, six hundred eighteen".